I fall asleep in both of them. Nice and cool. Great place to take a nap. HOWEVER, I have woken up more often in Lion King and stayed awake a bit more. And have done FOTLK more times.
I absolutely could never stay awake in the Nemo puppet show, and what I saw was not my cup of tea, so I only did that one twice. At least Lion King has better music and more, interesting, action.